Abstract:

In normal inverse synthetic aperture radar (ISAR) system, it is liable to cause the migration through resolution cell (MTRC) while the requested resolution of a radar is high and the size of targets is large. There also exists the same problem in bistatic-ISAR systems. This paper analyzes the reason of causing MTRC detailly in the module of bistatic-ISAR and compares it with the situation in mono-ISAR systems. Then under this base, an algorithm called Keystone transformation is used to dispose the time domain signal by dechirp processing, and it eliminates the MTRC in the target imaging. Finally, a simulation of scattered points is given.